Investigators say the twins were Dugas' house guests in Pensacola before they killed him on Aug. 27 and stole his belongings. That included a collection of cards for the game "Magic: The Gathering," valued at up to $100,000. Pensacola Police Detective Danny Harnett said the cards were sold in Pensacola, Tennessee and Georgia. Friends said Dugas and the twins met at a Pensacola comic store where they played the game and bought and sold game cards.

Georgia investigators unearthed Dugas' plastic and concrete-encased body in the backyard of the twins' fathers' home in Widner, Ga., after a weeks-long search. A friend reported Dugas missing in early September after he missed a lunch meeting.

A crew excavates a body from beneath a slab of concrete, buried in a Georgia backyard. (Uncredited/ASSOCIATED PRESS)

The Cormiers are in jail in Georgia, but Florida authorities say they will be extradited to Pensacola. They did not give a date for the extradition.

Prosecutors in Georgia are awaiting charging documents from Florida and have not dropped Georgia charges of murder and concealing a death, said Barrow County Chief Assistant District Attorney Deborah Wilbanks.